Amorphous cobalt-iron boride nanoparticles grown on B, N-doped carbon frame for efficient electrocatalytic oxygen evolution

被引：8

作者：

Ding, Junxia ^{[1
]}

Mo, Zunli ^{[1
]}

Zhu, Xiaolun ^{[1
]}

Zhu, Jianchen ^{[1
]}

Yang, Rui ^{[1
]}

Li, Rongkai ^{[1
]}

Liu, Nijuan ^{[1
]}

Guo, Ruibin ^{[1
]}

机构：

[1] Northwest Normal Univ, Res Ctr Gansu Mil & Civilian Integrat Adv Struct M, Coll Chem & Chem Engn, Key Lab Polymer Mat Gansu Prov,Minist Educ China,K, Lanzhou 730070, Peoples R China

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2024年 / 51卷

关键词：

CoFe-ZIF precursor; Cobalt-iron boride; B; N-doped carbon; Electrocatalyst; Oxygen evolution reaction; OER PERFORMANCE; FE; CO; NANOSHEETS; CATALYST; SURFACE;

D O I：

10.1016/j.ijhydene.2023.08.137

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Commencing from low-cost transition metal-based electrocatalysts, improving the catalytic activity and resource utilization is one of the ways to reduce the overall cost of hydrogen production from water cracking and improve energy conversion efficiency. Herein, the bimetallic cobalt-iron boride nanoparticles grown on the B, N-doped carbon frame (noted as CoFeB@BNC) was successfully synthesized by one-step pyrolysis boronizing using CoFe-zeolite imidazole frame (CoFe-ZIF) as the precursor and H3BO3 as the boron source. The excellent OER activity of CoFeB@BNC composite is attributed to the synergy of metal boride sites and additional B, N-doped carbon sites. Its overpotential is 297 mV at 10 mA cm(-2) and 332 mV at 50 mA cm(-2). Meanwhile, Tafel slope is only 43 mV dec(-1), showing faster OER kinetics. The introduction of appropriate amount of Fe creates high conductivity of CoFeB@BNC composite and significantly accelerates OER kinetics. The CoFe-ZIF precursor has a large number of structure defects, which provide abundant mesoporous and active sites for the CoFeB@BNC composite. The B, N-doped carbon frame improves the conductivity and stability of the material. This work provides a feasible strategy for the design and preparation of Fe-doped ZIF-67 precursor and its derived highly active and stable boride catalyst.(c) 2023 Published by Elsevier Ltd on behalf of Hydrogen Energy Publications LLC.

引用

页码：259 / 270

页数：12

共 59 条

[1] Tuning the Intermolecular Electron Transfer of Low-Dimensional and Metal-Free BCN/C60 Electrocatalysts via Interfacial Defects for Efficient Hydrogen and Oxygen Electrochemistry [J].